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plug-ins: Fix regression on importing RGB FITS

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The developers of SiriL sent me some RGB FITS images that rendered incorrectly
after d4f42076. These must be read in as 
planes rather than individual rows.
This commit is contained in:
Alx Sa 2023-06-29 15:31:50 +00:00
parent 84fb879973
commit 03ea666fc8
1 changed files with 50 additions and 27 deletions
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77
plug-ins/file-fits/fits.c
View file

@ -502,8 +502,12 @@ load_image (GFile *file,
NULL); NULL);
} }
/* If RGB FITS image, we need to increase the size by the number of channels */ /* If RGB FITS image, we need to read in the whole image so we can convert
pixels = (gdouble *) malloc (width * sizeof (gdouble) * channels); * the planes format to RGB */
if (hdu.naxis == 2)
pixels = (gdouble *) malloc (width * sizeof (gdouble) * channels);
else
pixels = (gdouble *) malloc (width * height * sizeof (gdouble) * channels);
if (! image) if (! image)
{ {
@ -543,41 +547,60 @@ load_image (GFile *file,
show_fits_errors (status); show_fits_errors (status);
/* Read pixel values in */ /* Read pixel values in */
for (fpixel[1] = height; fpixel[1] >= 1; fpixel[1]--) if (hdu.naxis == 2)
{ {
gdouble *temp = for (fpixel[1] = height; fpixel[1] >= 1; fpixel[1]--)
(gdouble *) malloc (width * sizeof (gdouble) * channels);
if (fits_read_pix (ifp, TDOUBLE, fpixel, row_length, &replace_val,
pixels, NULL, &status))
break;
if (datamin < datamax)
{ {
for (gint ii = 0; ii < row_length; ii++) if (fits_read_pix (ifp, TDOUBLE, fpixel, row_length, &replace_val,
pixels[ii] = (pixels[ii] - datamin) / (datamax - datamin); pixels, NULL, &status))
break;
if (datamin < datamax)
{
for (gint ii = 0; ii < row_length; ii++)
pixels[ii] = (pixels[ii] - datamin) / (datamax - datamin);
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, height - fpixel[1],
width, 1), 0,
format, pixels, GEGL_AUTO_ROWSTRIDE);
} }
}
else if (hdu.naxisn[2] && hdu.naxisn[2] == 3)
{
gint total_size = width * height * channels;
if (hdu.naxisn[2] && hdu.naxisn[2] == 3) /* Packed RGB format */ fits_read_img (ifp, TDOUBLE, 1, total_size, &replace_val,
pixels, NULL, &status);
if (! status)
{ {
/* Cover planes to RGB format */ gdouble *temp;
for (gint ii = 0; ii < (row_length / 3); ii++)
temp = (gdouble *) malloc (width * height * sizeof (gdouble) * channels);
if (datamin < datamax)
{
for (gint ii = 0; ii < total_size; ii++)
pixels[ii] = (pixels[ii] - datamin) / (datamax - datamin);
}
for (gint ii = 0; ii < (total_size / 3); ii++)
{ {
temp[(ii * 3)] = pixels[ii]; temp[(ii * 3)] = pixels[ii];
temp[(ii * 3) + 1] = pixels[ii + (row_length / 3)]; temp[(ii * 3) + 1] = pixels[ii + (total_size / 3)];
temp[(ii * 3) + 2] = pixels[ii + ((row_length / 3) * 2)]; temp[(ii * 3) + 2] = pixels[ii + ((total_size / 3) * 2)];
} }
}
else
{
temp = pixels;
}
gegl_buffer_set (buffer, gegl_buffer_set (buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
GEGL_RECTANGLE (0, height - fpixel[1], format, temp, GEGL_AUTO_ROWSTRIDE);
width, 1), 0,
format, temp, GEGL_AUTO_ROWSTRIDE); if (temp)
g_free (temp);
}
} }
if (status) if (status)
show_fits_errors (status); show_fits_errors (status);